AIA/NAS 962-2012 pdf download MACHINE GAS TUNGSTEN ARC FUSION WELDING EQUIPMENT
Purpose
This specification provides a standard for the manufacture,performance,inspection,reliability and procurement of amachine for gas tungsten arc welding systems exclusive ofweld positioners,weld manipulators,and other mechanicaltooling devices. This standard lists minimum requirementsand is not to limit design advances.
Classification
The welding systems shall be of the following types, sizesand class:
Type
Constant Current – DC
Combination Constant Potential/Constant Current DC
IIIAlternating Current
IVCombination Alternating current/Direct current

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